@SuppressWarnings("ALL")
public class Main {
    public static boolean isHui(String s){
        if (s == null || s.isEmpty()){
            return true;
        }
        int left = 0;
        int right = s.length() - 1;
        while(left <= right){
            left++;
            right--;
        }
        return false;
    }
    public static void main(String[] args) {
        isHui("11111111111");
    }
}
